Bruce L. Gardner and Gordon C. Rausser. (2002). Agriculture and its External Linkages. ELSEVIER.
Lua i Stíl Chicago (17ú heag.)Bruce L. Gardner and Gordon C. Rausser. Agriculture and Its External Linkages. ELSEVIER, 2002.
Lua MLA (8ú heag.)Bruce L. Gardner and Gordon C. Rausser. Agriculture and Its External Linkages. ELSEVIER, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.